The problem is that we are running out of time. Here 'that we are running out of time' is an example of -

• The problem is that we are running out of time. Here 'that we are running out of time' is an example of - Noun clause.

• A noun clause is a group of words that band together and act like a noun.
- Nouns clauses are used when a single word isn't enough.
- They're always dependent clauses.

• একটি বাক্যের চারটি স্থানে Noun clause  বসতে পারে -
1. subject হিসাবে 
2. transitive verb এর object হিসেবে
3. Linking verb এরপরে complement হিসাবে 
4. Preposition এর Object হিসেবে।

- প্রদত্ত বাক্যে Linking verb (is) এরপরে complement হিসাবে that we are running out of time বসেছে বিধায় এটি একটি noun clause.